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#include <assert.h>
#include <arch/ppc.H>
#include <util/singleton.H>
#include <kernel/segmentmgr.H>
#include <kernel/segment.H>
bool SegmentManager::handlePageFault(task_t* i_task, uint64_t i_addr)
{
return Singleton<SegmentManager>::instance().
_handlePageFault(i_task, i_addr);
}
void SegmentManager::addSegment(Segment* i_segment, size_t i_segId)
{
Singleton<SegmentManager>::instance()._addSegment(i_segment, i_segId);
}
void SegmentManager::initSLB()
{
Singleton<SegmentManager>::instance()._initSLB();
}
bool SegmentManager::_handlePageFault(task_t* i_task, uint64_t i_addr)
{
// This constant should come from page manager. Segment size.
const size_t SLBE_s = 40;
// Get segment ID from effective address.
size_t segId = i_addr >> SLBE_s;
// Call contained segment object to handle page fault.
if ((segId < MAX_SEGMENTS) && (NULL != iv_segments[segId]))
{
return iv_segments[segId]->handlePageFault(i_task, i_addr);
}
return false;
}
void SegmentManager::_addSegment(Segment* i_segment, size_t i_segId)
{
kassert(i_segId < MAX_SEGMENTS);
iv_segments[i_segId] = i_segment;
}
void SegmentManager::_initSLB()
{
// Flush SLB.
asm volatile("slbia" ::: "memory");
isync(); // Ensure slbia completes prior to slbmtes.
register uint64_t slbRS, slbRB;
// Default segment descriptors.
// ESID = 0, V = 1, Index = 1.
slbRB = 0x0000000008000001;
// B = 01 (1TB), VSID = 0, Ks = 0, Kp = 1, NLCLP = 0
slbRS = 0x4000000000000400;
// Add all segments to SLB.
for (size_t i = 0; i < MAX_SEGMENTS; i++)
{
// Add segment to SLB.
if (NULL != iv_segments[i])
{
asm volatile("slbmte %0, %1" :: "r"(slbRS), "r"(slbRB) : "memory");
}
// Increment ESID, VSID, Index.
slbRB += 0x0000010000000001;
slbRS += 0x0000000001000000;
}
isync(); // Ensure slbmtes complete prior to continuing on.
}
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